Collect MDM data from macOS

[codingllama]

Collect additional MDM fields like device model, OS version/build, Jamf version, etc.

Some information can be acquired from macOS APIs, others from "system" commands like /usr/bin/sw_vers and /usr/bin/profiles, some have to be acquired from 3rd party commands.

A major theme is trying to avoid string parsing, as I don't know when (and how) macOS might decide to internationalize strings (and break our parsers in the process).

Example:

$ go build ./tool/tsh && ./tsh device collect -d
> DeviceCollectedData {
>   "collect_time":  "2023-05-23T18:55:47.192327Z",
>   "os_type":  "OS_TYPE_MACOS",
>   "serial_number":  "XXXXXXXXXXXX",
>   "model_identifier":  "MacBookPro16,1",
>   "os_version":  "13.4.0",
>   "os_build":  "22F66",
>   "os_username":  "llama",
>   "jamf_binary_version":  "10.46.1-t1683911857",
>   "macos_enrollment_profiles":  "Enrolled via DEP: No\nMDM enrollment: Yes (User Approved)\nMDM server: ...",
>   "system_serial_number":  "XXXXXXXXXXXX"
> }

https://github.com/gravitational/teleport.e/issues/826

[public-teleport-github-review-bot]

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